問題詳情

請依下文回答第 11 題至第 13 題There is no single cause of mental retardation, but researchers have uncovered several causes, some of which arepreventable. Brain damage due to genetic conditions is a well-known cause of mental retardation. Most people arefamiliar with Down’s syndrome, which is caused by the formation of an additional chromosome. The normal numberof chromosomes for people is 46; babies with Down’s syndrome have 47. Another chromosome-related cause ofmental retardation is a malformation of the X-chromosome. Fortunately, blood tests can detect this problem early andimmediate measures can be taken to limit the damage.Not all brain damage resulting in mental retardation occurs because of problems in the genetic makeup of theinfant. Certain infectious diseases that the mother may contract during pregnancy can adversely affect the developingbrain of the baby, particularly if the mother catches these diseases during the first three months of her pregnancy.These diseases include rubella, herpes simplex, and syphilis. Because they are infectious, to a certain extent they arepreventable. Another preventable cause of mental retardation in newborns relates to what the pregnant woman ingests.Certain drugs are known to hinder the development of the baby’s brain such as thalidomide. However, the most easilypreventable cause of mental retardation is fetal alcohol syndrome. Drinking as little as one or two glasses of wine aweek during pregnancy could result in physical and intellectual impairments in the infant.
11 According to the passage, which of the following statements is true?
(A) Women over twenty-five have a higher risk of having babies with Down’s syndrome.
(B) Blood test is a very effective way to detect early mental retardation.
(C) Thalidomide is a medicine that benefits women during pregnancy.
(D) Drinking as little as one or two glasses of wine a week is never a factor for mental retardation.

參考答案

答案：B
難度：適中0.606557
統計：A(3),B(37),C(11),D(9),E(0)

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